Buy the cloth armor and 5 health potions as Mordekaiser use health instead of mana and the pots will allow you to stay near full hp and full shield as you can spam your attacks however you like. Do not go bot and try to get the first blood in bushes as you are slow early game and you want your hp for the pushing. Minions has spawned: Stay at your turret untill your wave comes, follow the next first in your wave and cast the metalscrap ability on him when he meets the enemys minions, this makes it abel to farm gold, exp and harass fast and stand in a safe distance if needed. If you do well you probobly wont have to go back to base untill first tower is down and the 2nd is a bit damaged. When i push i usualy starts with the metal scraps on me (if lane is free) or else on the 2nd minion, cast the wave and then use the mace ability, I guess thats pretty much it! I hope I explained it easy enough. One more tip before I end this: dont pick fights that can be avoid if there is any enemy missing in a lane, just survive and push. I have won 90% of the matches with this strategy. I hope it will help you to